diff --git a/examples/Tour.v b/examples/Tour.v
index ac546fc..402c5f0 100644
--- a/examples/Tour.v
+++ b/examples/Tour.v
@@ -250,7 +250,9 @@ For example, here's an implementation of a simple mutable counter that follows b
 |*)
 
 Camltac Module Counter := ocaml:{{
-  let value = Summary.ref ~stage:Interp ~name:"counter" 0
+  let value: int ref =
+    (* FIXME: Rocq 9.3 recently made this type abstract. *)
+    Obj.magic (Summary.ref ~stage:Interp ~name:"counter" 0)
 
   let inc () =
     value := !value + 1
diff --git a/src/module_manager.ml b/src/module_manager.ml
index 2f54d09..536e5c2 100644
--- a/src/module_manager.ml
+++ b/src/module_manager.ml
@@ -10,6 +10,10 @@ type state =
     packing_module: string option;
   }
 
+[%%if rocq >= (9, 3)]
+open Summary.Ref
+[%%endif]
+
 let state =
   Summary.ref
     ~stage:Synterp